US4080585A - Flat coil transformer for electronic circuit boards - Google Patents

Flat coil transformer for electronic circuit boards Download PDF

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Publication number
US4080585A
US4080585A US05/786,332 US78633277A US4080585A US 4080585 A US4080585 A US 4080585A US 78633277 A US78633277 A US 78633277A US 4080585 A US4080585 A US 4080585A
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Prior art keywords
straps
series
holes
alternately spaced
helical
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Expired - Lifetime
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US05/786,332
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Edward Henry Molthen
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Cubic Corp
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Cubic Corp
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/0006—Printed inductances
    • H01F2017/004—Printed inductances with the coil helically wound around an axis without a core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/097—Alternating conductors, e.g. alternating different shaped pads, twisted pairs; Alternating components

Definitions

  • the present invention generally pertains to electronic circuit boards and is particularly directed to a transformer for use on such boards.
  • a transformer for performing such functions as providing an impedance transformation for coupling energy from an oscillator to an RF amplifier, or for suppressing unwanted signal components.
  • Those portions of applicant's flat coil inductor design that are incorporated into the transformer of the present invention include a circuit board having first and second spaced, generally flat electrically insulative opposed surfaces, and having at least a first and a second series of holes extending along these surfaces and extending through the board, wherein the first series of holes is generally parallel to the second series of holes; a first conductive pattern on the first surface of the board and including a first series of straps extending between the first and second series of holes; and a second conductive pattern on the second surface of the board and including a second series of straps extending between the first and second series of holes. At least a portion of the walls of the holes are coated with a conductive layer to complete an electrical circuit through the straps and holes to form at least one generally helical conductive pattern.
  • the flat coil transformer of the present invention is characterized by a primary winding consisting of a first such helical conductive pattern including alternately spaced straps of the first series of straps, alternately spaced straps of the second series of straps, and alternately spaced straps of the second series of straps, and alternately spaced conductively coated holes of the first and second series of holes connecting together the alternately spaced straps of the first and second series of straps; and a secondary winding consisting of a second such helical conductive pattern including the remaining alternately spaced straps of the first series of straps, the remaining alternately spaced straps of said second series of straps, and the remaining alternately spaced conductive coated holes of the first and second series of holes connecting together the remaining alternately spaced straps of the first and second series of straps.
  • the first and second helical patterns each have a longitudinal axis that is generally parallel to the first and second series of holes.
  • the holes in the first helical pattern are staggered laterally in relation to the holes in the second helical pattern; and in one preferred embodiment, the longitudinal axes of the first and second helical patterns are separated from each other.
  • FIGS. 1A and 1B respectively illustrate opposite surfaces of a portion of an electronic circuit board containing one preferred embodiment of a flat coil transformer.
  • FIG. 2 is an enlarged sectional view taken on line 3-3 of FIG. 1A.
  • FIG. 3 is a perspective view of one end of a conductive strap extending to a conductively coated hole.
  • FIGS. 1A and 1B there is illustrated one preferred embodiment of a flat coil transformer according to the present invention.
  • the transformer is formed on an electronic circuit board 40.
  • the electronic circuit board 40 is made of fiberglass or other material having substantial mechanical strength and with electrically insulative surfaces.
  • the board 40 has a first flat surface 41 and a second flat surface 42 on the opposite side of the board 40.
  • Various circuit components (not shown) are mounted on the board 40.
  • the circuit board 40 has a first series of holes 43, 44 and a second series of holes 45, 46, extending along the board surfaces 41 and 42 and extending through the board 40.
  • the first series of holes 43, 44 is generally parallel to the second series of holes 45, 46.
  • first series of conductive straps 47, 48 extending between the first series of holes 43, 44 and the second series of holes 45, 46.
  • second series of conductive straps 49, 50 extending between the first series of holes 43, 44 and the second series of holes 45, 46.
  • the straps 47, 48, 49, 50 are an electrically conductive material.
  • the thickness of the conductive layer in the conductively coated holes 43, 44, 45, 46 is such that a clear opening remains between the two surfaces of the board into which a lead from a component may be inserted.
  • the holes 44, 46 are first drilled to a dimension of .034 inches.
  • the conductive coating 19 accounts for .003 inches of the diameter of the hole with the resulting finished hole opening being .031 inches.
  • the finished opening corresponds to the lead diameter of many standard components.
  • each of the straps terminates in a pad 36 surrounding the conductively coated holes.
  • the pads 36 are desirable to maximize the integrity of the electrical connections between the straps and conductively coated holes.
  • the fiberglass board is first plated with copper. Secondly, the series of holes 43, 44, 45, 46 are drilled through the board 40. Photoresist material is then applied over the entire board and holes. The photoresist is developed in those areas where it is desired to remove the electrically conductive copper. The developed photoresist is then washed away leaving a protective coating over the areas that are to have copper remain. The copper is etched from the board in all of the unprotected areas. High temperature oil is utilized to clean away the developed photoresist and exposes the copper and the holes. A copper layer is coated on the walls of the holes by an electroplating process. A tin-lead solder (not illustrated) is applied in a thin layer extending along all of the copper surfaces and between the copper surfaces in the holes. The resulting helical patterns are mechanically strong.
  • FIGS. 1A and 1B illustrate an embodiment of the flat coil transformer of the present invention wherein the longitudinal axis of the helical conductive patterns forming the primary and secondary windings are separated to select the extent of coupling between the primary and secondary windings.
  • the walls 18 of the holes 43, 44, 45, 46 are coated with a conductive layer to complete an electrical circuit through the straps and holes, thereby forming two generally helical conductive patterns which constitute the primary and secondary windings of the flat coil transformer.
  • the primary winding extends from terminal strip 51 to terminal strip 53 and includes alternately spaced straps 47, of the first series of straps, alternately spaced straps 49 of the second series of straps, and alternately spaced conductively coated holes 43, 45 of the first and second series of holes, which connect together the alternately spaced straps 47 and 49.
  • the secondary winding extends from terminal strip 52 to terminal strip 54 and includes the remaining alternately spaced straps 48 of the first series of straps, the remaining alternately spaced straps 50 of the second series of straps, and the remaining alternately spaced conductively coated holes 44, 46 of the first and second series of holes which connect together the remaining alternately spaced straps 48 and 50.
  • the helical pattern forming the primary winding has a longitudinal axis 57 and that the helical pattern forming the secondary winding has a longitudinal axis 59. Both of these longitudinal axes 57, 59 are generally parallel to said first series of holes 43, 44 and the second series of holes 45, 46.
  • the holes 43, 45 in the helical pattern forming the primary winding are staggered laterally in relation to the holes 44, 46 in the helical pattern forming the secondary winding; and the longitudinal axes 57 and 59 of the two helical patterns are separated from one another.
  • the extent of coupling between the primary and secondary windings is dependent upon the extent of the separation between the longitudinal axes 57 and 59.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

A flat coil transformer on an electronic circuit board. The primary winding consists of a first helical conductive pattern formed by alternately spaced straps of a first series of conductive straps on one surface of the circuit board, alternately spaced straps of a second series of straps on the opposite surface of the circuit board, and alternately spaced holes of first and second generally parallel series of conductive coated holes extending through the board and connecting together the alternately spaced straps of the first and second series of straps. The secondary winding consists of a second helical conductive pattern formed by the remaining alternately spaced straps of the first series of straps, the remaining alternately spaced straps of the second series of straps, and the remaining alternately spaced holes of the first and second series of holes connecting together the remaining alternately spaced straps of the first and second series of straps. The first and second helical patterns each have a longitudinal axis that is generally parallel to the first and second series of holes; and the holes in the first helical pattern are staggered laterally in relation to the holes in the second helical pattern.

Description

BACKGROUND OF THE INVENTION
The present invention generally pertains to electronic circuit boards and is particularly directed to a transformer for use on such boards.
In designing circuits which are embodied on electronic circuit boards, sometimes it is desirable to include a transformer for performing such functions as providing an impedance transformation for coupling energy from an oscillator to an RF amplifier, or for suppressing unwanted signal components.
However, conventional transformers are bulky and are not readily fitted on compact electronic circuit boards. As a result there often is a tendency to design around a combination of circuit elements requiring a transformer.
Although the use of flat coil inductors on electronic circuit boards is described in U.S. Pat. No. 3,185,947 to Freymodsson entitled "Inductive Module for Electronic Devices", as well as in applicant's U.S. Pat. No. 3,992,691 entitled "Electronic Circuit Board Flat Coil Inductor", the design of a flat coil transformer for an electronic circuit board heretofore has not been described in the prior art; and even through Freymodsson suggests that the design shown in his patent could be adapted for the fabrication of transformers, he does not describe how such could be accomplished.
SUMMARY OF THE INVENTION
In accordance with the present invention the design described in applicant's U.S. Pat. No. 3,992,691 is adapted to provide a flat coil transformer for electronic circuit boards.
Those portions of applicant's flat coil inductor design that are incorporated into the transformer of the present invention include a circuit board having first and second spaced, generally flat electrically insulative opposed surfaces, and having at least a first and a second series of holes extending along these surfaces and extending through the board, wherein the first series of holes is generally parallel to the second series of holes; a first conductive pattern on the first surface of the board and including a first series of straps extending between the first and second series of holes; and a second conductive pattern on the second surface of the board and including a second series of straps extending between the first and second series of holes. At least a portion of the walls of the holes are coated with a conductive layer to complete an electrical circuit through the straps and holes to form at least one generally helical conductive pattern.
The flat coil transformer of the present invention is characterized by a primary winding consisting of a first such helical conductive pattern including alternately spaced straps of the first series of straps, alternately spaced straps of the second series of straps, and alternately spaced straps of the second series of straps, and alternately spaced conductively coated holes of the first and second series of holes connecting together the alternately spaced straps of the first and second series of straps; and a secondary winding consisting of a second such helical conductive pattern including the remaining alternately spaced straps of the first series of straps, the remaining alternately spaced straps of said second series of straps, and the remaining alternately spaced conductive coated holes of the first and second series of holes connecting together the remaining alternately spaced straps of the first and second series of straps.
The first and second helical patterns each have a longitudinal axis that is generally parallel to the first and second series of holes. The holes in the first helical pattern are staggered laterally in relation to the holes in the second helical pattern; and in one preferred embodiment, the longitudinal axes of the first and second helical patterns are separated from each other. By selecting the amount of separation, if any, between the first and second helical patterns the extent of coupling between the primary and secondary windings can be selected.
BRIEF DESCRIPTION OF THE DRAWING
FIGS. 1A and 1B respectively illustrate opposite surfaces of a portion of an electronic circuit board containing one preferred embodiment of a flat coil transformer.
FIG. 2 is an enlarged sectional view taken on line 3-3 of FIG. 1A.
FIG. 3 is a perspective view of one end of a conductive strap extending to a conductively coated hole.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1A and 1B, there is illustrated one preferred embodiment of a flat coil transformer according to the present invention. The transformer is formed on an electronic circuit board 40. The electronic circuit board 40 is made of fiberglass or other material having substantial mechanical strength and with electrically insulative surfaces. The board 40 has a first flat surface 41 and a second flat surface 42 on the opposite side of the board 40. Various circuit components (not shown) are mounted on the board 40.
The circuit board 40 has a first series of holes 43, 44 and a second series of holes 45, 46, extending along the board surfaces 41 and 42 and extending through the board 40. The first series of holes 43, 44 is generally parallel to the second series of holes 45, 46.
On the first surface 41 of the board 40, there is a first series of conductive straps 47, 48 extending between the first series of holes 43, 44 and the second series of holes 45, 46. On the second surface 42 of the board 40, there is a second series of conductive straps 49, 50 extending between the first series of holes 43, 44 and the second series of holes 45, 46. The straps 47, 48, 49, 50 are an electrically conductive material.
The thickness of the conductive layer in the conductively coated holes 43, 44, 45, 46 is such that a clear opening remains between the two surfaces of the board into which a lead from a component may be inserted. In the preferred embodiment, (see FIG. 2), the holes 44, 46 are first drilled to a dimension of .034 inches. The conductive coating 19 accounts for .003 inches of the diameter of the hole with the resulting finished hole opening being .031 inches. Thus, the finished opening corresponds to the lead diameter of many standard components.
Referring now to FIG. 3, it will be noted that each of the straps, such as strap 48, terminates in a pad 36 surrounding the conductively coated holes. The pads 36 are desirable to maximize the integrity of the electrical connections between the straps and conductively coated holes.
In the manufacture of a flat coil transformer according to the present invention, the fiberglass board is first plated with copper. Secondly, the series of holes 43, 44, 45, 46 are drilled through the board 40. Photoresist material is then applied over the entire board and holes. The photoresist is developed in those areas where it is desired to remove the electrically conductive copper. The developed photoresist is then washed away leaving a protective coating over the areas that are to have copper remain. The copper is etched from the board in all of the unprotected areas. High temperature oil is utilized to clean away the developed photoresist and exposes the copper and the holes. A copper layer is coated on the walls of the holes by an electroplating process. A tin-lead solder (not illustrated) is applied in a thin layer extending along all of the copper surfaces and between the copper surfaces in the holes. The resulting helical patterns are mechanically strong.
FIGS. 1A and 1B illustrate an embodiment of the flat coil transformer of the present invention wherein the longitudinal axis of the helical conductive patterns forming the primary and secondary windings are separated to select the extent of coupling between the primary and secondary windings.
Referring to FIGS. 2 and 3 the walls 18 of the holes 43, 44, 45, 46 are coated with a conductive layer to complete an electrical circuit through the straps and holes, thereby forming two generally helical conductive patterns which constitute the primary and secondary windings of the flat coil transformer.
The primary winding extends from terminal strip 51 to terminal strip 53 and includes alternately spaced straps 47, of the first series of straps, alternately spaced straps 49 of the second series of straps, and alternately spaced conductively coated holes 43, 45 of the first and second series of holes, which connect together the alternately spaced straps 47 and 49.
The secondary winding extends from terminal strip 52 to terminal strip 54 and includes the remaining alternately spaced straps 48 of the first series of straps, the remaining alternately spaced straps 50 of the second series of straps, and the remaining alternately spaced conductively coated holes 44, 46 of the first and second series of holes which connect together the remaining alternately spaced straps 48 and 50.
It is seen in FIGS. 1A and 1B that the helical pattern forming the primary winding has a longitudinal axis 57 and that the helical pattern forming the secondary winding has a longitudinal axis 59. Both of these longitudinal axes 57, 59 are generally parallel to said first series of holes 43, 44 and the second series of holes 45, 46. The holes 43, 45 in the helical pattern forming the primary winding are staggered laterally in relation to the holes 44, 46 in the helical pattern forming the secondary winding; and the longitudinal axes 57 and 59 of the two helical patterns are separated from one another.
The extent of coupling between the primary and secondary windings is dependent upon the extent of the separation between the longitudinal axes 57 and 59.

Claims (4)

I claim:
1. A flat coil transformer for electronic circuit boards comprising:
a circuit board having first and second spaced, generally flat electrically insulative opposed surfaces, and having at least a first and a second series of holes extending along said surfaces and extending through said board, wherein said first series of holes is generally parallel to said second series of holes;
a first conductive pattern on said first surface of said board and comprising a first series of straps extending between the said first and second series of holes; and
a second conductive pattern on said second surface of said board and comprising a second series of straps extending between said first and second series of holes;
wherein at least a portion of the walls of said holes are coated with a conductive layer to complete an electrical circuit through said straps and holes forming at least one generally helical conductive pattern;
a primary winding consisting of a first said helical conductive pattern comprising alternately spaced straps of said first series of straps, alternately spaced straps of said second series of straps, and alternately spaced conductively coated holes of said first and second series of holes connecting together said alternately spaced straps of said first and second series of straps; and
a secondary winding consisting of a second said helical conductive pattern comprising the remaining alternately spaced straps of said first series of straps, the remaining alternately spaced straps of said second series of straps, and the remaining alternately spaced conductively coated holes of said first and second series of holes connecting together the remaining alternately spaced straps of the said first and second series of straps;
wherein said first and second helical patterns each have a longitudinal axis that is generally parallel to said first and second series of holes;
characterized by
said holes in said first helical pattern being staggered laterally in relation to said holes in said second helical pattern.
2. A transformer according to claim 1, wherein said longitudinal axes of said first and second helical patterns are separated from one another.
3. A transformer according to claim 2, wherein the helical conductive pattern of one of the windings further comprises consecutively spaced straps of said first series of straps, consecutively spaced straps of said second series of straps, and consecutively spaced holes of said first and second series of holes extending beyond the alternately spaced straps and holes.
4. A transformer according to claim 1, wherein the helical conductive pattern of one of the windings further comprises consecutively spaced straps of said first series of straps, consecutively spaced straps of said second series of straps, and consecutively spaced holes of said first and second series of holes extending beyond the alternately spaced straps and holes.
US05/786,332 1977-04-11 1977-04-11 Flat coil transformer for electronic circuit boards Expired - Lifetime US4080585A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201965A (en) * 1978-06-29 1980-05-06 Rca Corporation Inductance fabricated on a metal base printed circuit board
US4313151A (en) * 1979-01-12 1982-01-26 U.S. Philips Corporation Flat electric coil with tap
JPS61293010A (en) * 1985-06-20 1986-12-23 Matsushita Electric Ind Co Ltd Balun coil
US4644366A (en) * 1984-09-26 1987-02-17 Amitec, Inc. Miniature radio transceiver antenna
US4730241A (en) * 1984-07-27 1988-03-08 Tdk Corporation Laminated hybrid integrated DC-DC converter
US4758808A (en) * 1983-08-16 1988-07-19 Tdk Corporation Impedance element mounted on a pc board
US4816784A (en) * 1988-01-19 1989-03-28 Northern Telecom Limited Balanced planar transformers
EP0324240A3 (en) * 1988-01-15 1990-07-25 Northern Telecom Limited Balanced planar transformers
US5055816A (en) * 1989-06-26 1991-10-08 Motorola, Inc. Method for fabricating an electronic device
US5461353A (en) * 1994-08-30 1995-10-24 Motorola, Inc. Printed circuit board inductor
EP0649152A3 (en) * 1989-08-18 1995-10-25 Mitsubishi Electric Corp Integrable transformer with a semiconductor integrated circuit and its manufacturing method.
US5514832A (en) * 1994-10-31 1996-05-07 International Business Machines Corporation Microcavity structures, fabrication processes, and applications thereof
US5687091A (en) * 1995-06-08 1997-11-11 Automatic Control Technologies Integrated arrangement for monitoring without interrupt process flow by novel sensor arrangement with unique data processing system
EP1085673A1 (en) * 1999-09-14 2001-03-21 Philips Corporate Intellectual Property GmbH Coupling network
US6208531B1 (en) 1993-06-14 2001-03-27 Vlt Corporation Power converter having magnetically coupled control
DE10031064A1 (en) * 2000-06-26 2002-01-10 Siemens Ag micro-transformer
DE10062400A1 (en) * 2000-12-14 2002-07-04 Daimler Chrysler Ag Flexible inductive component for conductive foils has two conducting track strip patterns, coil core forming individual layers of foil laminate; second strip pattern forms coil enclosing core
US7236086B1 (en) 1993-06-14 2007-06-26 Vlt, Inc. Power converter configuration, control, and construction
US7352270B1 (en) 2006-10-27 2008-04-01 Itt Manufacturing Enterprises, Inc. Printed circuit board with magnetic assembly
FR2979788A1 (en) * 2011-09-07 2013-03-08 Commissariat Energie Atomique PRINTED CIRCUIT BOARD
US8692640B2 (en) 2011-09-07 2014-04-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives Coiled magnetic ring
US8890519B2 (en) 2011-09-07 2014-11-18 Commissariat A L'energie Atomique Et Aux Energies Alternatives Printed circuit board comprising two coils
US9363902B2 (en) 2012-05-03 2016-06-07 Qualcomm Mems Technologies, Inc. Three-dimensional multilayer solenoid transformer
US20160163450A1 (en) * 2014-07-18 2016-06-09 Qualcomm Incorporated Superposed structure 3d orthogonal through substrate inductor
WO2022128353A3 (en) * 2020-12-17 2022-09-01 Sew-Eurodrive Gmbh & Co. Kg Printed circuit board, in particular printed circuit board which can be used as a primary conductor

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US3721932A (en) * 1971-09-14 1973-03-20 Motorola Inc Broadband radio frequency ferrite transformer providing close coupling
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US3085899A (en) * 1960-05-23 1963-04-16 Nat Resistance Corp Means and method for forming electrical components
US3486149A (en) * 1968-01-15 1969-12-23 Ibm Variable ratio die cast pulse transformer
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201965A (en) * 1978-06-29 1980-05-06 Rca Corporation Inductance fabricated on a metal base printed circuit board
US4313151A (en) * 1979-01-12 1982-01-26 U.S. Philips Corporation Flat electric coil with tap
US4758808A (en) * 1983-08-16 1988-07-19 Tdk Corporation Impedance element mounted on a pc board
US4730241A (en) * 1984-07-27 1988-03-08 Tdk Corporation Laminated hybrid integrated DC-DC converter
US4644366A (en) * 1984-09-26 1987-02-17 Amitec, Inc. Miniature radio transceiver antenna
JPS61293010A (en) * 1985-06-20 1986-12-23 Matsushita Electric Ind Co Ltd Balun coil
EP0324240A3 (en) * 1988-01-15 1990-07-25 Northern Telecom Limited Balanced planar transformers
US4816784A (en) * 1988-01-19 1989-03-28 Northern Telecom Limited Balanced planar transformers
US5055816A (en) * 1989-06-26 1991-10-08 Motorola, Inc. Method for fabricating an electronic device
EP0649152A3 (en) * 1989-08-18 1995-10-25 Mitsubishi Electric Corp Integrable transformer with a semiconductor integrated circuit and its manufacturing method.
US6208531B1 (en) 1993-06-14 2001-03-27 Vlt Corporation Power converter having magnetically coupled control
US7236086B1 (en) 1993-06-14 2007-06-26 Vlt, Inc. Power converter configuration, control, and construction
US5461353A (en) * 1994-08-30 1995-10-24 Motorola, Inc. Printed circuit board inductor
US5514832A (en) * 1994-10-31 1996-05-07 International Business Machines Corporation Microcavity structures, fabrication processes, and applications thereof
US5687091A (en) * 1995-06-08 1997-11-11 Automatic Control Technologies Integrated arrangement for monitoring without interrupt process flow by novel sensor arrangement with unique data processing system
US6919775B2 (en) * 1999-09-14 2005-07-19 Koninklijke Philips Electronics N.V. Network coupler
EP1085673A1 (en) * 1999-09-14 2001-03-21 Philips Corporate Intellectual Property GmbH Coupling network
US6771142B1 (en) * 1999-09-14 2004-08-03 Koninklijke Philips Electronics N.V. Network coupler
DE10031064A1 (en) * 2000-06-26 2002-01-10 Siemens Ag micro-transformer
DE10031064C2 (en) * 2000-06-26 2003-09-18 Siemens Ag Microtrafo and circuit arrangement with it
DE10062400A1 (en) * 2000-12-14 2002-07-04 Daimler Chrysler Ag Flexible inductive component for conductive foils has two conducting track strip patterns, coil core forming individual layers of foil laminate; second strip pattern forms coil enclosing core
DE10062400C2 (en) * 2000-12-14 2003-07-24 Daimler Chrysler Ag Flexible inductive components for conductor foils
US7352270B1 (en) 2006-10-27 2008-04-01 Itt Manufacturing Enterprises, Inc. Printed circuit board with magnetic assembly
FR2979788A1 (en) * 2011-09-07 2013-03-08 Commissariat Energie Atomique PRINTED CIRCUIT BOARD
EP2568781A1 (en) 2011-09-07 2013-03-13 Commissariat à l'Énergie Atomique et aux Énergies Alternatives Printed circuit
US8692640B2 (en) 2011-09-07 2014-04-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives Coiled magnetic ring
US8723631B2 (en) 2011-09-07 2014-05-13 Commissariat A L'energie Atomique Et Aux Energies Alternatives Printed circuit board
US8890519B2 (en) 2011-09-07 2014-11-18 Commissariat A L'energie Atomique Et Aux Energies Alternatives Printed circuit board comprising two coils
US9363902B2 (en) 2012-05-03 2016-06-07 Qualcomm Mems Technologies, Inc. Three-dimensional multilayer solenoid transformer
US20160163450A1 (en) * 2014-07-18 2016-06-09 Qualcomm Incorporated Superposed structure 3d orthogonal through substrate inductor
US9666362B2 (en) * 2014-07-18 2017-05-30 Qualcomm Incorporated Superposed structure 3D orthogonal through substrate inductor
WO2022128353A3 (en) * 2020-12-17 2022-09-01 Sew-Eurodrive Gmbh & Co. Kg Printed circuit board, in particular printed circuit board which can be used as a primary conductor

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